Position fix

src/Squidex.Infrastructure.GetEventStore/EventSourcing/GetEventStore.cs

@@ -58,7 +58,7 @@ namespace Squidex.Infrastructure.EventSourcing
         {
             var streamName = await connection.CreateProjectionAsync(projectionHost, prefix, streamFilter);
 
-            var sliceStart = ProjectionHelper.ParsePosition(position) ?? -1;
+            var sliceStart = ProjectionHelper.ParsePosition(position);
 
             StreamEventsSlice currentSlice;
             do

src/Squidex.Infrastructure.GetEventStore/EventSourcing/GetEventStoreSubscription.cs

@@ -33,7 +33,7 @@ namespace Squidex.Infrastructure.EventSourcing
 
             this.eventStoreConnection = eventStoreConnection;
             this.eventSubscriber = eventSubscriber;
-            this.position = ProjectionHelper.ParsePosition(position);
+            this.position = ProjectionHelper.ParsePositionOrNull(position);
 
             var streamName = eventStoreConnection.CreateProjectionAsync(projectionHost, prefix, streamFilter).Result;
 

src/Squidex.Infrastructure.GetEventStore/EventSourcing/ProjectionHelper.cs

@@ -85,9 +85,14 @@ namespace Squidex.Infrastructure.EventSourcing
             return projectionsManager;
         }
 
-        public static long? ParsePosition(string position)
+        public static long? ParsePositionOrNull(string position)
         {
             return long.TryParse(position, out var parsedPosition) ? (long?)parsedPosition : null;
         }
+
+        public static long ParsePosition(string position)
+        {
+            return long.TryParse(position, out var parsedPosition) ? parsedPosition : 0;
+        }
     }
 }