Filter out tiering metadata during CopyObject (#15936)

cmd/object-handlers.go

@@ -909,6 +909,11 @@ func getCpObjMetadataFromHeader(ctx context.Context, r *http.Request, userMeta m
 	// to change the original one.
 	defaultMeta := make(map[string]string, len(userMeta))
 	for k, v := range userMeta {
+		// skip tier metadata when copying metadata from source object
+		switch k {
+		case metaTierName, metaTierStatus, metaTierObjName, metaTierVersionID:
+			continue
+		}
 		defaultMeta[k] = v
 	}