diff --git a/src/models/GeneralScription.ts b/src/models/GeneralScription.ts
index ebf0e6c..81fdd72 100644
--- a/src/models/GeneralScription.ts
+++ b/src/models/GeneralScription.ts
@@ -5,7 +5,7 @@ import { hexToUtf8 } from 'zutils/utils/string.util'
 import logger from 'logger/logger'
 
 @dbconn()
-@index({ from: 1 }, { unique: false })
+@index({ from: 1, op: 1 }, { unique: false })
 @index({ hash: 1 }, { unique: true })
 @index({ from: 1, blockTime: 1 }, { unique: false })
 @modelOptions({
@@ -41,7 +41,7 @@ export class GeneralScriptionClass extends BaseModule {
     const dataStr = hexToUtf8(event.input)
     const regexp = /data:,{\"p\":\"cf-20\",\"op\":\"(.+?)\",\"val\":\"(.+?)\"}/
     const match = dataStr.match(regexp)
-    if (!match) {
+    if (!match || match.length < 3) {
       logger.log('not a general scription:', event.hash)
       return
     }