diff --git a/svc/product_series_auto_scheduler.go b/svc/product_series_auto_scheduler.go
index 22dda6c..7563fb7 100644
--- a/svc/product_series_auto_scheduler.go
+++ b/svc/product_series_auto_scheduler.go
@@ -565,18 +565,12 @@ func productSeriesRuleFitsGroup(group string, rule productSeriesAutoRule) bool {
 	if rule.GroupKey != "" && rule.GroupKey != group {
 		return false
 	}
-	groupSizes := map[string]struct{}{}
-	for _, size := range productSeriesSizeGroups[group] {
-		groupSizes[normalizeProductSeriesSize(size)] = struct{}{}
-	}
-	if len(groupSizes) == 0 {
-		return true
-	}
-	for size := range rule.Ratio {
-		if _, ok := groupSizes[size]; !ok {
-			return false
-		}
-	}
+	// NOTE: In this installation, Nebim ItemDim1Code (size_code) can be numeric tokens that do not match the
+	// hardcoded group size lists (e.g. "XS/S/M..."). Enforcing those lists causes valid rules to be rejected
+	// and series assignment to stay blank across many products.
+	//
+	// We therefore rely only on explicit rule.GroupKey when provided, and otherwise allow the rule to compete
+	// based on actual stock consumption.
 	return true
 }
 
diff --git a/svc/routes/product_series.go b/svc/routes/product_series.go
index 76b920c..b6da31c 100644
--- a/svc/routes/product_series.go
+++ b/svc/routes/product_series.go
@@ -373,12 +373,20 @@ LIMIT 1
 				row.MappingWarning = "PG urun veya varyant token eslesmesi bulunamadi"
 			}
 			assignKey := assignmentKey(row.ProductCode, row.Dim1ID, row.Dim3ID)
-			for _, id := range existing[assignKey] {
-				if d, ok := defByID[id]; ok {
-					row.SeriesIDs = append(row.SeriesIDs, id)
-					row.Series = append(row.Series, d)
+			appendSeries := func(key string) {
+				for _, id := range existing[key] {
+					if d, ok := defByID[id]; ok {
+						row.SeriesIDs = append(row.SeriesIDs, id)
+						row.Series = append(row.Series, d)
+					}
 				}
 			}
+			appendSeries(assignKey)
+			// Fallback: if we couldn't match dim3-specific assignments (dim3 token ambiguity / missing),
+			// show the default (dim3 NULL) assignments for the same product+color.
+			if len(row.SeriesIDs) == 0 && row.Dim3Code != "" && row.Dim1ID > 0 {
+				appendSeries(assignmentKey(row.ProductCode, row.Dim1ID, 0))
+			}
 			sort.Slice(row.Series, func(i, j int) bool { return row.Series[i].Code < row.Series[j].Code })
 			sort.Slice(row.SeriesIDs, func(i, j int) bool { return row.SeriesIDs[i] < row.SeriesIDs[j] })
 			out = append(out, *row)