[Fix-3077][ui] Fix the edit duplicated name verify (#3376)

dolphinscheduler-ui/src/js/conf/home/pages/dag/_source/udp/udp.vue

@@ -99,6 +99,7 @@
     name: 'udp',
     data () {
       return {
+        originalName: '',
         // dag name
         name: '',
         // dag description
@@ -169,12 +170,15 @@
           this.$emit('onUdp')
         }
 
-        // verify that the name exists
-        this.store.dispatch('dag/verifDAGName', this.name).then(res => {
+        if (this.originalName !== this.name) {
+          this.store.dispatch('dag/verifDAGName', this.name).then(res => {
+            _verif()
+          }).catch(e => {
+            this.$message.error(e.msg || '')
+          })
+        } else {
           _verif()
-        }).catch(e => {
-          this.$message.error(e.msg || '')
-        })
+        }
       },
       /**
        * Close the popup
@@ -196,6 +200,7 @@
       this.udpList = dag.globalParams
       this.udpListCache = dag.globalParams
       this.name = dag.name
+      this.originalName = dag.name
       this.description = dag.description
       this.syncDefine = dag.syncDefine
       this.timeout = dag.timeout || 0