diff --git a/MVMCoreUI/FormUIHelpers/FormFieldEffect/ClearFormFieldEffectModel.swift b/MVMCoreUI/FormUIHelpers/FormFieldEffect/ClearFormFieldEffectModel.swift
index fefe8499..173c0e33 100644
--- a/MVMCoreUI/FormUIHelpers/FormFieldEffect/ClearFormFieldEffectModel.swift
+++ b/MVMCoreUI/FormUIHelpers/FormFieldEffect/ClearFormFieldEffectModel.swift
@@ -50,7 +50,7 @@ public class ClearFormFieldEffectModel: FormFieldEffectProtocol {
     public func encode(to encoder: Encoder) throws {
         var container = encoder.container(keyedBy: CodingKeys.self)
         try container.encode(fieldKey, forKey: .fieldKey)
-        try container.encode(activatedRuleIds, forKey: .activatedRuleIds)
+        try container.encodeIfPresent(activatedRuleIds, forKey: .activatedRuleIds)
         try container.encodeModels(rules, forKey: .rules)
     }