phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a4f60b2882cb283e6ba5627f4cbb8a63' 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 ('a4f60b2882cb283e6ba5627f4cbb8a63', -1, 1770740443, 1770740443, 'd849d821', 37, 0, 0)

Line : 187
File : sessions.php