My SQL locks exceeds the lock table size

Error Code: 1206. The total number of locks exceeds the lock table size

show variables like 'innodb_buffer_pool_size';

innodb_buffer_pool_size 8388608

set global innodb_buffer_pool_size=4g;

Access Denied;

"C:\Program Files\MySQL\MySQL Router 8.0\bin\mysqlrouter.exe" -c "C:\ProgramData\MySQL\MySQL Router\mysqlrouter.conf" --service

C:\ProgramData\MySQL\MySQL Router\mysqlrouter.conf

innodb_buffer_pool_size=8M

innodb_buffer_pool_size=4G