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 ('0751c2e27bebb0e74733e9f80e66fec6', -1, 1524158590, 1524158590, '36900e86', 18, 0, 0)

Line : 187
File : sessions.php