phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '5ca2405a5296da8b93ca66c64ed81dd8' 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 ('5ca2405a5296da8b93ca66c64ed81dd8', -1, 1770582152, 1770582152, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php