On creating or opening a new document, if the animation docker is not visible, this QDebug message will be produced:
QAbstractItemModel::endInsertColumns: Invalid index ( 0 , 101 ) in model KisAnimTimelineFramesModel(0x2b72b4dcad0)
The backtrace indicates that it comes from https://invent.kde.org/graphics/krita/-/blob/cabfac1d4ad9a4c5f43b49f8ee4c9cf849abc959/plugins/dockers/animation/KisTimeBasedItemModel.cpp#L579. Now I though this may be a simple off-by-one error, but if I change the line above into `m_d->numFramesOverride = lastFrame + 1;` it still continues to produce the message, so I'm not sure.
*** This bug has been marked as a duplicate of bug 473485 ***