Debug info: Objects are are not allowed: context_system

Error code: codingerror

Stack trace:

    line 782 of /lib/dml/moodle_database.php: coding_exception thrown

    line 592 of /lib/dml/pgsql_native_moodle_database.php: call to moodle_database->detect_objects()

    line 914 of /lib/dml/pgsql_native_moodle_database.php: call to pgsql_native_moodle_database->normalise_value()

    line 1015 of /tag/lib.php: call to pgsql_native_moodle_database->insert_record()

    line 168 of /tag/lib.php: call to tag_assign()

    line 139 of /tag/edit.php: call to tag_set()

Output buffer: <pre class="notifytiny">stdClass Object ( [tagid] =&gt; 9 [component] =&gt; core [itemid] =&gt; 3 [itemtype] =&gt; tag [contextid] =&gt; context_system Object ( [_id:protected] =&gt; 1 [_contextlevel:protected] =&gt; 10 [_instanceid:protected] =&gt; 0 [_path:protected] =&gt; /1 [_depth:protected] =&gt; 1 ) [ordering] =&gt; 0 [timecreated] =&gt; 1398329305 [timemodified] =&gt; 1398329305 [tiuserid] =&gt; 0 ) </pre>