phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO piranha_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('f4588b06a5f2e4063042204d09fbf7b1', -1, 1711626153, 1711626153, '36d3cb2d', -1, 0, '0', '0')

Line : 175
File : sessions.php