diff --git a/lib/db/install.xml b/lib/db/install.xml
index a7c620f4b1d..a36d01f4b71 100644
--- a/lib/db/install.xml
+++ b/lib/db/install.xml
@@ -2382,7 +2382,7 @@
         <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
       </KEYS>
     </TABLE>
-    <TABLE NAME="repository_instance_config" COMMENT="The config for intances" PREVIOUS="repository_instances" NEXT="backup_files">
+    <TABLE NAME="repository_instance_config" COMMENT="The config for intances" PREVIOUS="repository_instances" NEXT="backup_courses">
       <FIELDS>
         <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" NEXT="instanceid"/>
         <FIELD NAME="instanceid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" PREVIOUS="id" NEXT="name"/>
@@ -2393,35 +2393,7 @@
         <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
       </KEYS>
     </TABLE>
-    <TABLE NAME="backup_files" COMMENT="To store and recode ids to user and course files" PREVIOUS="repository_instance_config" NEXT="backup_ids">
-      <FIELDS>
-        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" NEXT="backup_code"/>
-        <FIELD NAME="backup_code" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="id" NEXT="file_type"/>
-        <FIELD NAME="file_type" TYPE="char" LENGTH="10" NOTNULL="true" SEQUENCE="false" PREVIOUS="backup_code" NEXT="path"/>
-        <FIELD NAME="path" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" PREVIOUS="file_type" NEXT="old_id"/>
-        <FIELD NAME="old_id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="path" NEXT="new_id"/>
-        <FIELD NAME="new_id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="old_id"/>
-      </FIELDS>
-      <KEYS>
-        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="backup_code-file_type-path"/>
-        <KEY NAME="backup_code-file_type-path" TYPE="unique" FIELDS="backup_code, file_type, path" PREVIOUS="primary"/>
-      </KEYS>
-    </TABLE>
-    <TABLE NAME="backup_ids" COMMENT="To store and convert ids in backup/restore" PREVIOUS="backup_files" NEXT="backup_courses">
-      <FIELDS>
-        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" NEXT="backup_code"/>
-        <FIELD NAME="backup_code" TYPE="int" LENGTH="12" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="id" NEXT="table_name"/>
-        <FIELD NAME="table_name" TYPE="char" LENGTH="30" NOTNULL="true" SEQUENCE="false" PREVIOUS="backup_code" NEXT="old_id"/>
-        <FIELD NAME="old_id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="table_name" NEXT="new_id"/>
-        <FIELD NAME="new_id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="old_id" NEXT="info"/>
-        <FIELD NAME="info" TYPE="text" LENGTH="medium" NOTNULL="true" SEQUENCE="false" PREVIOUS="new_id"/>
-      </FIELDS>
-      <KEYS>
-        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="backup_code-table_name-old_id"/>
-        <KEY NAME="backup_code-table_name-old_id" TYPE="unique" FIELDS="backup_code, table_name, old_id" PREVIOUS="primary"/>
-      </KEYS>
-    </TABLE>
-    <TABLE NAME="backup_courses" COMMENT="To store every course backup status" PREVIOUS="backup_ids" NEXT="block">
+    <TABLE NAME="backup_courses" COMMENT="To store every course backup status" PREVIOUS="repository_instance_config" NEXT="block">
       <FIELDS>
         <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" NEXT="courseid"/>
         <FIELD NAME="courseid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="id" NEXT="laststarttime"/>
diff --git a/lib/db/upgrade.php b/lib/db/upgrade.php
index 920c404e191..854fbefe385 100644
--- a/lib/db/upgrade.php
+++ b/lib/db/upgrade.php
@@ -7089,5 +7089,28 @@ FROM
         upgrade_main_savepoint(true, 2011120503.03);
     }
 
+    if ($oldversion < 2011120503.08) {
+        // Drop some old backup tables, not used anymore
+
+        // Define table backup_files to be dropped
+        $table = new xmldb_table('backup_files');
+
+        // Conditionally launch drop table for backup_files
+        if ($dbman->table_exists($table)) {
+            $dbman->drop_table($table);
+        }
+
+        // Define table backup_ids to be dropped
+        $table = new xmldb_table('backup_ids');
+
+        // Conditionally launch drop table for backup_ids
+        if ($dbman->table_exists($table)) {
+            $dbman->drop_table($table);
+        }
+
+        // Main savepoint reached
+        upgrade_main_savepoint(true, 2011120503.08);
+    }
+
     return true;
 }