Can't do CMT synchronizing of my own chart.

Hi, I have Desigo PX (Xworks v6.1) project with many instances of 1 chart. Now I need to update* this chart (changed internal logic). Type of PLCs are PXC100-E-D and PXC200-E-D.

Don't tell me about the way when we save to library new version of chart  and then Drag-and-drop it to replace all instances, I want to know another way!

I have read the next topic:

https://support.industry.siemens.com/tf//WW/en/posts/updating-nested-charts/208716?page=0&pageSize=10

And all attached documents about CM/CMT synchronizing but I can't synchronizing my chart.

The Synchronize Option is always Deactivated (gray).

My chart consists of: standart blocks without other charts.  

The official answers from Siemens Support:

1. As I understand it, only a manual replacement is possible after the object is not available in the manager ...

2. Do I understand this in the right manner ? As described below, it is possible to swap nested charts (= compounds) individually, but not in a bulk operation.

3. It is possible to replace single nested charts or single FW blocks, means 1 by 1, but not in a mass operation like you need.