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 ('c8b0299a50b5bf4d584c3c9ff849c139', -1, 1711715193, 1711715193, '03eee2a7', -7, 0, 0)

Line : 187
File : sessions.php