phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('b1f1356b2f85b0953e07a45c8b88f878', -1, 1713961151, 1713961151, '038dcabb', -4, 0, 0)

Line : 187
File : sessions.php