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 ('c622ea9ce0c2cf15b4f78b51880ce4b5', -1, 1508509602, 1508509602, '36514902', 15, 0, 0)

Line : 211
File : sessions.php