diff --git a/Logic/State/MapState.ts b/Logic/State/MapState.ts
index 319c3547a4..9f9c331b13 100644
--- a/Logic/State/MapState.ts
+++ b/Logic/State/MapState.ts
@@ -55,7 +55,8 @@ export default class MapState extends UserRelatedState {
      */
     public historicalUserLocations: FeatureSourceForLayer & Tiled;
     /**
-     * The number of seconds that the GPS-locations are stored in memory
+     * The number of seconds that the GPS-locations are stored in memory.
+     * Time in seconds
      */
     public gpsLocationHistoryRetentionTime = new UIEventSource(7 * 24 * 60 * 60, "gps_location_retention")
     public historicalUserLocationsTrack: FeatureSourceForLayer & Tiled;
@@ -199,7 +200,7 @@ export default class MapState extends UserRelatedState {
         const now = new Date().getTime()
         features.data = features.data
             .map(ff => ({feature: ff.feature, freshness: new Date(ff.freshness)}))
-            .filter(ff => (now - ff.freshness.getTime()) < this.gpsLocationHistoryRetentionTime.data)
+            .filter(ff => (now - ff.freshness.getTime()) < 1000 * this.gpsLocationHistoryRetentionTime.data)
         features.ping()
         const self = this;
         let i = 0
diff --git a/Models/ThemeConfig/LegacyJsonConvert.ts b/Models/ThemeConfig/LegacyJsonConvert.ts
index 5a691e0a29..4128e6d919 100644
--- a/Models/ThemeConfig/LegacyJsonConvert.ts
+++ b/Models/ThemeConfig/LegacyJsonConvert.ts
@@ -1,4 +1,5 @@
 import LineRenderingConfigJson from "./Json/LineRenderingConfigJson";
+import PointRenderingConfig from "./PointRenderingConfig";
 
 export default class LegacyJsonConvert {
 
@@ -29,22 +30,26 @@ export default class LegacyJsonConvert {
         }
 
         if (config.mapRendering === undefined && config.id !== "sidewalks") {
+            config.mapRendering = []
             // This is a legacy format, lets create a pointRendering
             let location: ("point" | "centroid")[] = ["point"]
             let wayHandling: number = config["wayHandling"] ?? 0
             if (wayHandling !== 0) {
                 location = ["point", "centroid"]
             }
-            config.mapRendering = [
-                {
-                    icon: config["icon"],
-                    iconBadges: config["iconOverlays"],
-                    label: config["label"],
-                    iconSize: config["iconSize"],
-                    location,
-                    rotation: config["rotation"]
-                }
-            ]
+           if(config["icon"] ?? config["label"] !== undefined){
+               
+            const pointConfig =   {
+                icon: config["icon"],
+                iconBadges: config["iconOverlays"],
+                label: config["label"],
+                iconSize: config["iconSize"],
+                location,
+                rotation: config["rotation"]
+            }
+            config.mapRendering.push(pointConfig)
+           }
+            
 
             if (wayHandling !== 1) {
                 const lineRenderConfig = <LineRenderingConfigJson>{
@@ -56,6 +61,9 @@ export default class LegacyJsonConvert {
                     config.mapRendering.push(lineRenderConfig)
                 }
             }
+            if(config.mapRendering.length === 0){
+                throw "Could not convert the legacy theme into a new theme: no renderings defined for layer "+config.id
+            }
 
         }
 
diff --git a/test/LegacyThemeLoader.spec.ts b/test/LegacyThemeLoader.spec.ts
new file mode 100644
index 0000000000..96eda96232
--- /dev/null
+++ b/test/LegacyThemeLoader.spec.ts
@@ -0,0 +1,158 @@
+import T from "./TestHelper";
+import LegacyJsonConvert from "../Models/ThemeConfig/LegacyJsonConvert";
+import LayoutConfig from "../Models/ThemeConfig/LayoutConfig";
+
+export default class LegacyThemeLoaderSpec extends T {
+
+    private static readonly walking_node_theme = {
+        "id": "walkingnodenetworks",
+        "title": {
+            "en": "Walking node networks"
+        },
+        "maintainer": "L'imaginaire",
+        "icon": "https://upload.wikimedia.org/wikipedia/commons/3/30/Man_walking_icon_1410105361.svg",
+        "description": {
+            "en": "This map shows walking node networks"
+        },
+        "language": [
+            "en"
+        ],
+        "version": "2021-10-02",
+        "startLat": 51.1599,
+        "startLon": 3.34750,
+        "startZoom": 12,
+        "clustering": {
+            "maxZoom": 12
+        },
+        "layers": [
+            {
+                "id": "node2node",
+                "name": {
+                    "en": "node to node links"
+                },
+                "source": {
+                    "osmTags": {
+                        "and": [
+                            "network=rwn",
+                            "network:type=node_network"
+                        ]
+                    }
+                },
+                "minzoom": 12,
+                "title": {
+                    "render": {
+                        "en": "node to node link"
+                    },
+                    "mappings": [
+                        {
+                            "if": "ref~*",
+                            "then": {
+                                "en": "node to node link <strong>{ref}</strong>"
+                            }
+                        }
+                    ]
+                },
+                "width": {
+                    "render": "4"
+                },
+                "color": {
+                    "render": "#8b1e20"
+                },
+                "tagRenderings": [
+                    {
+                        "question": {
+                            "en": "When was this node to node link last surveyed?"
+                        },
+                        "render": {
+                            "en": "This node to node link was last surveyed on {survey:date}"
+                        },
+                        "freeform": {
+                            "key": "survey:date",
+                            "type": "date"
+                        },
+                        "mappings": [
+                            {
+                                "if": "survey:date:={_now:date}",
+                                "then": "Surveyed today!"
+                            }
+                        ]
+                    }
+                ]
+            },
+            {
+                "id": "node",
+                "name": {
+                    "en": "nodes"
+                },
+                "source": {
+                    "osmTags": "rwn_ref~*"
+                },
+                "minzoom": 12,
+                "title": {
+                    "render": {
+                        "en": "walking node <strong>{rwn_ref}</strong>"
+                    }
+                },
+                "label": {
+                    "mappings": [
+                        {
+                            "if": "rwn_ref~*",
+                            "then": "<div style='position: absolute; top: 10px; right: 10px; color: white; background-color: #8b1e20; width: 20px; height: 20px; border-radius: 100%'>{rwn_ref}</div>"
+                        }
+                    ]
+                },
+                "tagRenderings": [
+                    {
+                        "question": {
+                            "en": "When was this walking node last surveyed?"
+                        },
+                        "render": {
+                            "en": "This walking node was last surveyed on {survey:date}"
+                        },
+                        "freeform": {
+                            "key": "survey:date",
+                            "type": "date"
+                        },
+                        "mappings": [
+                            {
+                                "if": "survey:date:={_now:date}",
+                                "then": "Surveyed today!"
+                            }
+                        ]
+                    },
+                    {
+                        "question": {
+                            "en": "How many other walking nodes does this node link to?"
+                        },
+                        "render": {
+                            "en": "This node links to {expected_rwn_route_relations} other walking nodes."
+                        },
+                        "freeform": {
+                            "key": "expected_rwn_route_relations",
+                            "type": "int"
+                        }
+                    },
+                    "images"
+                ]
+            }
+        ]
+    }
+
+    constructor() {
+        super("LegacyThemeLoader",
+
+            [
+                ["Walking_node_theme", () => {
+
+                    const config = LegacyThemeLoaderSpec.walking_node_theme
+                    LegacyJsonConvert.fixThemeConfig(config)
+                    // @ts-ignore
+                    const theme = new LayoutConfig(config)
+
+                }]
+            ]
+        );
+    }
+
+
+}
\ No newline at end of file
diff --git a/test/TestAll.ts b/test/TestAll.ts
index e6dc4f9e7c..f53e1beb46 100644
--- a/test/TestAll.ts
+++ b/test/TestAll.ts
@@ -14,6 +14,7 @@ import WikidataSpecTest from "./Wikidata.spec.test";
 import ImageProviderSpec from "./ImageProvider.spec";
 import ActorsSpec from "./Actors.spec";
 import ReplaceGeometrySpec from "./ReplaceGeometry.spec";
+import LegacyThemeLoaderSpec from "./LegacyThemeLoader.spec";
 
 
 ScriptUtils.fixUtils()
@@ -31,7 +32,8 @@ const allTests = [
     new WikidataSpecTest(),
     new ImageProviderSpec(),
     new ActorsSpec(),
-    new ReplaceGeometrySpec()
+    new ReplaceGeometrySpec(),
+    new LegacyThemeLoaderSpec()
 ]
 
 Utils.externalDownloadFunction = async (url) => {