phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b68fb5cd3245f8d7caabeac8638437d7' 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 ('b68fb5cd3245f8d7caabeac8638437d7', -1, 1767403036, 1767403036, 'd849d819', -9, 0, 0)

Line : 187
File : sessions.php