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 ('626221f177d248eb31e07156325c173e', -1, 1711673603, 1711673603, '2cc865aa', 5, 0, 0)

Line : 187
File : sessions.php