phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c4b59a9c9a1daee232f316fb0968c37c' 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 ('c4b59a9c9a1daee232f316fb0968c37c', -1, 1770525756, 1770525756, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php