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 ('f0fce63e2c43e0f71cd33003f29eb5e9', -1, 1513052740, 1513052740, '36eaf776', 23, 0, 0)

Line : 211
File : sessions.php