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 ('0856b385a6bb447f46ccc339d9fa4186', -1, 1526976099, 1526976099, '36c45659', 4, 0, 0)

Line : 187
File : sessions.php