phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6e1391ec498abf6640b4705c355fede3' 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 ('6e1391ec498abf6640b4705c355fede3', -1, 1767373154, 1767373154, 'd849d82e', -4, 0, 0)

Line : 187
File : sessions.php