phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1c0fd26b49f096dadfc4274e86d43688' 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 ('1c0fd26b49f096dadfc4274e86d43688', -1, 1770190373, 1770190373, 'd849d8a2', -4, 0, 0)

Line : 187
File : sessions.php