diff --git a/changelog/25439.txt b/changelog/25439.txt
new file mode 100644
index 0000000000..7b1775c9b9
--- /dev/null
+++ b/changelog/25439.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+core/quotas: Deleting a namespace that contains a rate limit quota no longer breaks replication
+```
diff --git a/vault/mount.go b/vault/mount.go
index bc61936929..42bfbde68d 100644
--- a/vault/mount.go
+++ b/vault/mount.go
@@ -953,7 +953,7 @@ func (c *Core) unmountInternal(ctx context.Context, path string, updateStorage b
 
 	removePathCheckers(c, entry, viewPath)
 
-	if c.quotaManager != nil {
+	if c.quotaManager != nil && !c.IsPerfSecondary() {
 		if err := c.quotaManager.HandleBackendDisabling(ctx, ns.Path, path); err != nil {
 			c.logger.Error("failed to update quotas after disabling mount", "path", path, "error", err)
 			return err