diff --git a/schemas/ispyb/updates/2024_07_08_BLSampleGroup_ownerId.sql b/schemas/ispyb/updates/2024_07_08_BLSampleGroup_ownerId.sql
new file mode 100644
index 00000000..ccfbde39
--- /dev/null
+++ b/schemas/ispyb/updates/2024_07_08_BLSampleGroup_ownerId.sql
@@ -0,0 +1,13 @@
+INSERT IGNORE INTO SchemaStatus (scriptName, schemaStatus) VALUES ('2024_07_08_BLSampleGroup_ownerId.sql', 'ONGOING');
+
+ALTER TABLE BLSampleGroup
+  ADD ownerId int(10) unsigned COMMENT 'Sample group owner',
+  ADD CONSTRAINT BLSampleGroup_fk_ownerId
+      FOREIGN KEY (ownerId)
+        REFERENCES Person (personId)
+          ON UPDATE CASCADE ON DELETE RESTRICT;
+
+-- Undo:
+-- ALTER TABLE BLSampleGroup DROP CONSTRAINT BLSampleGroup_fk_ownerId, DROP ownerId;
+
+UPDATE SchemaStatus SET schemaStatus = 'DONE' WHERE scriptName = '2024_07_08_BLSampleGroup_ownerId.sql';