Raw cost and burdened cost is null in pa_budget_versions

Hi,

For few of the projects, Raw cost and Burdened Cost is NULL with a valid Attribute1 in PA_BUDGET_VERSIONS.

As  a result, no records exists for these versions in PA_BUDGET_LINES table.

Is there any API which I can use to create records in PA_BUDGET_LINES for such records. 

Also, are there any dummy values that I can insert into Raw Cost and Burdened Cost  column of PA_BUDGET_VERSIONS table, without affecting the functionality.

Thanks in advance.