Solution

Locate the dam's data; go to:


[1. input/edit] - [1.1. Sows] - [1.1.5. Mating/farrowing/weaning data (individual)]

Press 'F3' (Search), enter the dam's animal number, and press 'Enter'.

Locate the correct cycle data.

Go to the 'F-9 Individual animals' tab.

Locate the animal in question and modify the tattoo details.

Click the green checkmark to confirm.