diff --git a/dba/patches/1.1.6.sql b/dba/patches/1.1.6.sql
index 17bdb27b..4b5ff70d 100644
--- a/dba/patches/1.1.6.sql
+++ b/dba/patches/1.1.6.sql
@@ -10,7 +10,7 @@ CREATE TABLE locks (
   type TEXT,
   scope TEXT,
   depth INT,
-  owner INT REFERENCES usr(user_no),
+  owner TEXT,
   timeout INTERVAL,
   start TIMESTAMP DEFAULT current_timestamp
 );
diff --git a/dba/rscds.sql b/dba/rscds.sql
index 83c062e7..58e91863 100644
--- a/dba/rscds.sql
+++ b/dba/rscds.sql
@@ -111,7 +111,7 @@ CREATE TABLE locks (
   type TEXT,
   scope TEXT,
   depth INT,
-  owner INT REFERENCES usr(user_no),
+  owner TEXT,
   timeout INTERVAL,
   start TIMESTAMP DEFAULT current_timestamp
 );