fix: prevent custom field with same name but different case

src/components/FeatureType/FeatureTypeCustomForm.vue

@@ -636,7 +636,7 @@ export default {
 
     checkUniqueName() {
       const occurences = this.customForms
-        .map((el) => el.name)
+        .map((el) => el.name.toLowerCase()) // check with lower case in case of slugificaton for data views generation
         .filter((el) => el === this.form.name.value);
       return occurences.length === 1;
     },