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 ('dbb1e9821ea0063c9d96b1ff9e62cc2f', -1, 1526885496, 1526885496, '36c46ede', 13, 0, 0)

Line : 186
File : sessions.php