[Fix-3077][ui] Fix the edit name duplicated verify (#3346)

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

@@ -169,17 +169,12 @@
           this.$emit('onUdp')
         }
 
-        // Edit => direct storage
-        if (this.store.state.dag.name) {
+        // verify that the name exists
+        this.store.dispatch('dag/verifDAGName', this.name).then(res => {
           _verif()
-        } else {
-          // New First verify that the name exists
-          this.store.dispatch('dag/verifDAGName', this.name).then(res => {
-            _verif()
-          }).catch(e => {
-            this.$message.error(e.msg || '')
-          })
-        }
+        }).catch(e => {
+          this.$message.error(e.msg || '')
+        })
       },
       /**
        * Close the popup