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 ('92ad51e67a1a0a684083d768473c0dc1', -1, 1710835645, 1710835645, '03ebc713', -10, 0, 0)

Line : 187
File : sessions.php