phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '587f9a62a2d1ef9e86848ecd6380ddcf' 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 ('587f9a62a2d1ef9e86848ecd6380ddcf', -1, 1777198859, 1777198859, 'd849d811', -4, 0, 0)

Line : 187
File : sessions.php