phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '291ff0206d4e6e6c3f4988d5488558e6' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('291ff0206d4e6e6c3f4988d5488558e6', -1, 1765880709, 1765880709, 'd849d834', -4, 0, 0)

Line : 187
File : sessions.php