fix

common/models/psources/CoinIssueCoin.php

@@ -50,6 +50,9 @@ class CoinIssueCoin extends CommonActiveRecord
     public function verfiySymbol($attribute, $params)
     {
         $model = CoinIssueCoin::find()->where(['symbol' => $this->symbol, 'platform_id' => $this->platform_id])->orderBy('id desc')->one();
+        if (false == $model) {
+            return true;
+        }
         if (0 == $model->category) {
             $this->addError($attribute, '名称已存在');
             return false;