Error uploading annotations with Yolov8 Detection format

[uxuegu]

Actions before raising this issue

• I searched the existing issues and did not find anything similar.
• I read/searched the docs

Steps to Reproduce

No response

Expected Behavior

I want to upload new annotations done in Yolov8 to a job that already has some annotations and not deleting anything

Possible Solution

No response

Context

I labelled some images, download the labels on Yolov8 Detection format to train a model. I trained a model to obtain the rest of the labels. When trying to upload those new labels, not only nothing new appears on my dataset but also the ones previously done disappear.
I have organized the folder to upload the same way as it is downloaded from cvat. A .zip file containing a folder named "labels" where all the labels are organized in .txt files, a data.yaml with all the different classes and a train.txt containing the path of the images.
The only file that changes is the "labels" folder where now all the labels done by the trained model of Yolov8 appear (data.yaml and train.txt are the ones that are donwload previously from cvat when exporting the job dataset with the labels)

Environment

No response