phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('b3bd7bd2d8cfa9b39f18d68db5b0ce40', -1, 1524412263, 1524412263, '36517577', 15, 0, 0)

Line : 211
File : sessions.php