Short answerCheck three things in order: the series year, the appearance note, and the render style on the brief. Fix the cause, then redraw the affected anchors and re-render the groups that show it; finished takes are not touched.
Redrawing before you know why it went wrong just spends credits on the same mistake.
Rendered takes keep the look they were drawn with, so episodes that already look right are safe. On the episodes that show the problem, ask the Line Producer to re-render the specific groups, or use Fix with agent on the Review page with the Scene drift or Character missing chip. Do not re-render a whole episode for one costume.
Set the year on the brief, keep wardrobe out of appearance notes, and read the first anchors on the generation board before rendering: a wrong-era anchor is a 5-credit fix there and a 100-credit fix after a segment has rendered.
Still stuck? Email support@dawnwood.ai with your account email, the series, the episode and the segment or group — see what to include.