aggregateMultipleReports summed my filename label

I am trying to create a plugin and i have done everything i need but i have a little problem and i cant resolve that.

in aggregateDayReport i can insert data as blob and get it period = day but when i use another period like week label (the label is a text and that is my file name) summed together. for example:

I send my file name to my dimension (in onLookupAction) and save that name to log_action
when i call period = week column summed together and that does not file name id anymore

Could you please help me to resolve this problem and save my life?

thank you