fix: random `ruleNumber` error

app/lib/dal/indexDAL/leveldb/LevelDBBlockchain.ts

@@ -268,7 +268,7 @@ export class LevelDBBlockchain extends LevelDBTable<DBBlock>
     block.fork = false;
     // We remove the eventual fork
     const forkKey = LevelDBBlockchain.trimForkKey(block.number, block.hash);
-    if (this.forks.getOrNull(forkKey)) {
+    if (await this.forks.getOrNull(forkKey)) {
       await this.forks.del(forkKey);
     }
     // We return the saved block