When you need to edit or remove data entry, there are few items that might not be available to edit or remove:
That happens usually because that data entry is not the last data entered in that sow or group.
On that case, you can check by accessing a sow card or a group card, by going to history and check if that data was the last entry.
For instance, the sow 99123 you can see a weaning and later with mating
Therefore, in order to edit the weaning date, you would have to go through the following steps:
1 - Remove the mating
2 - Edit the date of the weaning or any other data you need to adjust
3 - Add the mating back
Then, you can check if the sow card has been updated
