phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '081b008e1c1eea16eb98de8d7b1e98c0' 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 ('081b008e1c1eea16eb98de8d7b1e98c0', -1, 1769858858, 1769858858, 'd849d851', -4, 0, 0)

Line : 187
File : sessions.php