修复:MergeRelevance时错误

src/DatabaseServices/Entity/Extrude.ts

@@ -458,6 +458,7 @@ export class ExtrudeSolid extends Entity
 
         const MergeRelevance = () =>
         {
+            if (!this.Id || !target.Id) return;
             for (let kf of target.RelevanceKnifs)
             {
                 let kfBr = kf.Object as ExtrudeSolid;