phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '308e1108c6d0c4480f2c2c08b4c78868' 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 ('308e1108c6d0c4480f2c2c08b4c78868', -1, 1756488800, 1756488800, 'd849d883', -4, 0, 0)

Line : 187
File : sessions.php