diff --git a/main/java/org/gcube/portal/databook/server/MigrationStarter.java b/main/java/org/gcube/portal/databook/server/MigrationStarter.java
index 16b86c9..5d839c9 100644
--- a/main/java/org/gcube/portal/databook/server/MigrationStarter.java
+++ b/main/java/org/gcube/portal/databook/server/MigrationStarter.java
@@ -516,7 +516,7 @@ public class MigrationStarter {
                                                     .value(PREFERENCE, QueryBuilder.bindMarker())
                                                     .build());
                     flag = session_dest.execute(stmtCreateUser.bind(
-                                                    row.getUuid(USER_ID),
+                                                    row.getString(USER_ID),
                                                     row.getString(TYPE),
                                                     row.getString(PREFERENCE))).wasApplied();
                 }