changes to fixed asset table permissions property

We would like to add a field to the Fixed Asset table, but I cannot save changes to the table because the table properties include read permissions to table 5629 Ins. Coverage Ledger Entry (which we do not have access to because we did not purchase the fixed asset-insurance granule). Is it OK to remove the Permissions to the Ins. Coverage Ledger Entry table in the Fixed Asset table properties since we do not have access to that table?