phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '7c7a63f3aa707d80ef37a4ced62cb7d1' 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 ('7c7a63f3aa707d80ef37a4ced62cb7d1', -1, 1769990679, 1769990679, 'd849d837', -9, 0, 0)

Line : 187
File : sessions.php