diff --git a/db_scripts/diff/10950.down b/db_scripts/diff/10950.down
new file mode 100644
index 00000000..ceb8bc6a
--- /dev/null
+++ b/db_scripts/diff/10950.down
@@ -0,0 +1,2 @@
+use accounting;
+alter table prepaid_costs drop column timestamp;
diff --git a/db_scripts/diff/10950.up b/db_scripts/diff/10950.up
new file mode 100644
index 00000000..926d0af6
--- /dev/null
+++ b/db_scripts/diff/10950.up
@@ -0,0 +1,5 @@
+use accounting;
+
+alter table prepaid_costs add column timestamp timestamp not null;
+update prepaid_costs set timestamp = now();
+alter table prepaid_costs add key (timestamp);