What is the significance of " Specify Time-Independent Management of Organiz. Units

Hello SAP Gurus,

Please Help!

SPRO->Asset Accounting->Master Data->Specify Time-Independent Management of Organiz. Units

I have a requirement where I have to change account assignment for about 100,000 assets using eCATTS. The problem is if I change the account assignmment then there is an automatic posting of an FI transfer document, which I can disable in the above path, but I am not sure what consequences I would have by disabling auto FI doc post. I have read the help note several times but cannot check verify the impacts of the above change.

If I keep the above setting on, then it is taking forever to change the account assignment.

Thanks

Sam