update review condition

Author: Sunny Jiao

framework/src/main/java/org/tron/core/Wallet.java

@@ -785,10 +785,11 @@ public WitnessList getPaginatedNowWitnessList(long offset, long limit) throws
       In the maintenance period, the VoteStores will be cleared.
       To avoid the race condition of VoteStores deleted but Witness vote counts not updated,
       return retry error.
-      Only apply to non-solidity request.
+      Only apply to requests that rely on the latest block,
+      which means the normal fullnode requests with HEAD cursor.
     */
-    boolean isSolidityRequest = Args.getInstance().isSolidityNode() || (getCursor() == Cursor.SOLIDITY);
-    if (!isSolidityRequest && chainBaseManager.getDynamicPropertiesStore().getStateFlag() == 1) {
+    if (!Args.getInstance().isSolidityNode() && (getCursor() == Cursor.HEAD) &&
+        chainBaseManager.getDynamicPropertiesStore().getStateFlag() == 1) {
       String message =
           "Service temporarily unavailable during maintenance period. Please try again later.";
       throw new MaintenanceUnavailableException(message);