diff --git a/ui/src/components/SystemEnvConfig.vue b/ui/src/components/SystemEnvConfig.vue
index 2cbcdacd..954eed4f 100644
--- a/ui/src/components/SystemEnvConfig.vue
+++ b/ui/src/components/SystemEnvConfig.vue
@@ -99,7 +99,11 @@
             <q-btn
               :label="$t('general.submit')"
               v-bind="qBtnStyle"
-              :disable="!newVarValue || !newVarKey || refNewVarKey.hasError"
+              :disable="
+                !newVarValue ||
+                !newVarKey ||
+                (refNewVarKey && refNewVarKey.hasError)
+              "
               @click="setEnv()"
             />
           </q-card-actions>