phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'fc80f765bd260d3dac347f49b9c5afc0' 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 ('fc80f765bd260d3dac347f49b9c5afc0', -1, 1766107257, 1766107257, 'd849d817', -4, 0, 0)

Line : 187
File : sessions.php