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 ('14699c10d9c42da28fe34c27a0ec1f37', -1, 1711699059, 1711699059, '2cde5a19', -10, 0, 0)

Line : 187
File : sessions.php