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 ('0a3fbe2e604a348b9b4b12b3f8563f24', -1, 1508588338, 1508588338, '369c437a', 9, 0, 0)

Line : 187
File : sessions.php