Duplicate multiple row coming from same table

[Herod]

Hello all,

I would like to duplicate few rows on the same table.
I use Appsheet for my budget management.
I have both table 
Expenses

Budget

Budget have a Ref_ROWS to key Date on Expenses

Every month, i do my budget and a new date is created,
each time i imput Tags manually in table expenses.
If its possible i would like these Tags are duplicate and add new after the old with new key date.
I tried with both actions, but im not comfortable with this code.

Thanks for helping me

Herod