diff --git a/src/config/field-overrides/validationRule.js b/src/config/field-overrides/validationRule.js
index 15178337e..2de2e93a6 100644
--- a/src/config/field-overrides/validationRule.js
+++ b/src/config/field-overrides/validationRule.js
@@ -11,9 +11,11 @@ export default new Map([
     }],
     ['leftSide', {
         component: LeftSideExpressionField,
+        unique: false,
     }],
     ['rightSide', {
         component: RightSideExpressionField,
+        unique: false,
     }],
     ['organisationUnitLevels', {
         referenceType: 'organisationUnitLevel',