phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '31e520b68945de4ec14da9f2f754e4f0' 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 ('31e520b68945de4ec14da9f2f754e4f0', -1, 1769179178, 1769179178, 'd849d89a', -4, 0, 0)

Line : 187
File : sessions.php