diff --git a/config/sync/field.storage.node.field_programme.yml b/config/sync/field.storage.node.field_programme.yml
index 4ba2a83c..bd8bbc2e 100644
--- a/config/sync/field.storage.node.field_programme.yml
+++ b/config/sync/field.storage.node.field_programme.yml
@@ -12,7 +12,7 @@ settings:
   target_type: node
 module: core
 locked: false
-cardinality: 1
+cardinality: -1
 translatable: true
 indexes: {  }
 persist_with_no_fields: false