diff --git a/db/versions/11230-brownEucalyptus/00-addClientObservationType.sql b/db/versions/11230-brownEucalyptus/00-addClientObservationType.sql
index 935758b8d..f69e20611 100644
--- a/db/versions/11230-brownEucalyptus/00-addClientObservationType.sql
+++ b/db/versions/11230-brownEucalyptus/00-addClientObservationType.sql
@@ -1,2 +1,3 @@
+ALTER TABLE vn.clientObservation DROP COLUMN IF EXISTS observationTypeFk;
 ALTER TABLE vn.clientObservation ADD COLUMN IF NOT EXISTS observationTypeFk TINYINT(3) UNSIGNED NULL;
 ALTER TABLE vn.clientObservation ADD CONSTRAINT clientObservationTypeFk FOREIGN KEY IF NOT EXISTS (observationTypeFk) REFERENCES vn.observationType(id);