Fixed Term Deposit block for posting and stop further process

Hi,

Some of our fixed term deposit business will  migrate from SAP to New system (Summit) on cut over day, so I want block certain unfinished transaction in sap for further G/L posting,stop any further afterwards process, and keep some others product type remain process with no change? do you have any idea?

Any ideas of block TBB1 and TBB4 for unfinished transaction of certain product type （101，102，105，106...), and keep product type  (103,104) business as usual?

Any ideas of block FWAB and FWPA,FWAA  with certain bonds unfinished transction with product type (301,303），and keep bonds transction with product type (302,304,305)as usual?

one way may be available is through OBBH to block FI posting, but  it not work for FWAA amortization.

Appreciate any inputs - thanks.