Perhaps Marc or someone else will have a better suggestion but I will share something that has worked in the congregation I attend.
If you are the TheocBase Administrator or you know who is, you could have them try to delete the cloud data which needs to be done from a computer. To do this do the following:
1. Hover your cursor over the cloud icon in TheocBase.
2. Click "Delete Cloud Data".
3. When you do this a box will pop up after a little bit asking if you want to "Sign Out", or "Synchronize". Click "Synchronize" , not "Sign Out". If you Click "Sign Out" all of your information will disappear.
4. Ask all of the brothers in your congregation who use TheocBase to open the TheocBase App, wait 5 to 10 seconds until they see a downward arrow appear in the cloud icon, then tap it. Please note, always wait 5 to 10 seconds after you open TheocBase before you update your information. If you don't, you may inadvertently cancel changes that have been made.
5. A box will pop up that says "The cloud data has been reset, your information will be replaced. Continue?", have them select "Yes".
6. If another box pops up that says something to the effect of "The same information can be found locally on your device. Do you want to save this information?" Have them select "No". If they do not select "No", TheocBase will not sync properly and it will cause issues in the long run.
Following these steps has really helped to alleviate a lot of issues in the congregation I attend. We have at least 20 brothers who use TheocBase and we share a single login. I hope this works for you.