Backported the fix of #770177 from 10.0 to 5.5 so that the migration

question will not be asked repeatedly.

debian/changelog

@@ -5,6 +5,8 @@ mariadb-5.5 (5.5.39-3) UNRELEASED; urgency=low
     the package mariadb-server-5.5 to allow overwriting the innochecksum
     man page file which has changed location (LP: #1368124) as per
     doc https://www.debian.org/doc/debian-policy/ch-relationships.html#s7.6.1
+  * Backported the fix of #770177 from 10.0 to 5.5 so that the migration
+    question will not be asked repeatedly.
 
  -- Otto Kekäläinen <otto@seravo.fi>  Sat, 04 Oct 2014 22:45:02 +0300
 

debian/mariadb-server-5.5.postinst

@@ -134,6 +134,8 @@ EOF
     # data directory and then somewhen gets purged by the admin.
     db_set mysql-server/postrm_remove_database false || true
 
+    # Clean up old flags before setting new one
+    rm $mysql_statedir/debian-*.flag
     # To avoid downgrades.
     touch $mysql_statedir/debian-5.5.flag
 
@@ -146,7 +148,7 @@ EOF
     set +e
     bash /usr/bin/mysql_install_db --rpm --user=mysql 2>&1 | $ERR_LOGGER
     set -e
-    
+
     ## On every reconfiguration the maintenance user is recreated.
     #
     # - It is easier to regenerate the password every time but as people