Chaining Management - Combination and Data Issues

Hi All,

We are trying to do Chaining management but we are facing issue.

Use case -

For a given item we want to copy sales history and forecast to a new item for all combinations.

We expect that Chaining management will pick up all the existing combinations for item A ( source item) and create similar combinations for item B ( target item) and copy the data.

However when we ran chaining the data copied to new combinations but it is multiplies by number of combinations.

For example : -

Original combinations -

Item - A

Month - Jan -2019

Customers - Org - Forecast