diff --git a/app/Repositories/Rule/RuleRepository.php b/app/Repositories/Rule/RuleRepository.php
index 32a1377b4b..77c3ddd85b 100644
--- a/app/Repositories/Rule/RuleRepository.php
+++ b/app/Repositories/Rule/RuleRepository.php
@@ -426,7 +426,7 @@ class RuleRepository implements RuleRepositoryInterface
             $stopProcessing = $trigger['stop_processing'] ?? false;
             $active         = $trigger['active'] ?? true;
             $type           = $trigger['type'];
-            if (true === $trigger['prohibited']) {
+            if (true === ($trigger['prohibited'] ?? false) && !str_starts_with($type, '-')) {
                 $type = sprintf('-%s', $type);
             }