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 ('042e8767ff2e0927c3658e9a9318e04d', -1, 1713949669, 1713949669, '038ac842', -4, 0, 0)

Line : 187
File : sessions.php