diff --git a/source/structure/r7.sindri.json b/source/structure/r7.sindri.json
index 1ee206c..0c8d515 100644
--- a/source/structure/r7.sindri.json
+++ b/source/structure/r7.sindri.json
@@ -235,7 +235,7 @@
 				},
 				{
 					"name": "group_id",
-					"type": "string_medium",
+					"type": "integer",
 					"nullable": false
 				},
 				{