PMing myself gives an error

[Quilford]

When I send a PM to myself, I receive the following error:

General Error
SQL ERROR [ mysqli ]

Duplicate entry '1502337-15481-15481' for key 'msg_id_user_id_author_id' [1062]

SQL

INSERT INTO phpbb_privmsgs_to (msg_id, user_id, author_id, folder_id, pm_new, pm_unread, pm_forwarded) VALUES (1502337, 15481, 15481, -2, 0, 0, 0)

BACKTRACE

FILE: includes/db/mysqli.php
LINE: 162
CALL: dbal->sql_error()

FILE: includes/functions_privmsgs.php
LINE: 1506
CALL: dbal_mysqli->sql_query()

FILE: includes/ucp/ucp_pm_compose.php
LINE: 747
CALL: submit_pm()

FILE: includes/ucp/ucp_pm.php
LINE: 137
CALL: compose_pm()

FILE: includes/functions_module.php
LINE: 507
CALL: ucp_pm->main()

FILE: ucp.php
LINE: 389
CALL: p_master->load_active()

Just a heads up.

[Quilford]

I should mention that the PM still goes through.

[SleepyKrew]

This happened to me last couple times I PM'd myself too.

[saulres]

It's been happening for a long time.

[SleepyKrew]

Post #3 in that thread is a pretty cool post