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 ('ac40a2a52bb258ae6b137c999d05a5c6', -1, 1713999826, 1713999826, '038dca36', -11, 0, 0)

Line : 187
File : sessions.php