The location of the animals in Velos should correspond to the actual location of the cow in the barn. Velos checks if this is the case. If not, the Animals at unexpected group/pen widget on the Dashboard then shows for which animals a difference in locations is detected.
Click on Show attentions in the widget to see the complete list with animals:
Is the animal in the correct pen, but is the location in Velos wrong? Change it in Velos with the Actions button, or, if applicable, in your farm management software.
Is the location in Velos correct, but is the animal in the wrong pen? Move the animal to the correct pen in the barn.