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-rw-r--r--services/sync/modules/service.js3
1 files changed, 2 insertions, 1 deletions
diff --git a/services/sync/modules/service.js b/services/sync/modules/service.js
index f8c64b0fa..32e047f53 100644
--- a/services/sync/modules/service.js
+++ b/services/sync/modules/service.js
@@ -1338,9 +1338,10 @@ Sync11Service.prototype = {
// We successfully synchronized.
// Check if the identity wants to pre-fetch a migration sentinel from
// the server.
+ // Only supported by Sync server API level 2+
// If we have no clusterURL, we are probably doing a node reassignment
// so don't attempt to get it in that case.
- if (this.clusterURL) {
+ if (Svc.Prefs.get("APILevel") >= 2 && this.clusterURL) {
this.identity.prefetchMigrationSentinel(this);
}