Company File ID/URI keeps changing.

Can you please explain why the URI /Company File ID keeps changing on my MYOB database?  This causes my website sync software to complain with this error in the MYOB API log file:

“[Message, The company file can't be found. It might have been deleted.][Message, The company file can't be found. It might have been deleted.]”

Problem is I understand this may happen if I upgrade MYOB, however I have not done any upgrades and have remained static on the following 2019.2.1 build 2019.2.22.5066.

Here is the history of the changing URI just in this last month:

28th August changed from below to - http://localhost:8080/AccountRight/2ab71849-bff8-4aff-b95c-d1e6d1af0252

27th August changed from below to - http://localhost:8080/AccountRight/0255fb97-0f46-451b-b141-d72f493104c1

8th August changed from below to - http://localhost:8080/AccountRight/3a7f1309-0a7f-4f08-9d61-113771fb74f9

2nd August changed from (no record) to - http://localhost:8080/AccountRight/fca4d9a0-9094-46e1-984e-0eba05af8c80

SOOOOOO FRUSTRATING!