The importing of animation attachments into an existing skeleton (via either "replace" or ignore") doesn't work.
For example, for json like this
...
"animations": {
"victory": {
"slots": {
"eye_l": {
"attachment": [
{ "name": "chibi/eye_closed_l" }
]
},
"eye_r": {
"attachment": [
{ "name": "chibi/eye_closed_r" }
]
}
},
"bones": {
...
the "slots" part is ignored completely, leading to missing keys. The json was created in the same version of spine."animations": {
"victory": {
"slots": {
"eye_l": {
"attachment": [
{ "name": "chibi/eye_closed_l" }
]
},
"eye_r": {
"attachment": [
{ "name": "chibi/eye_closed_r" }
]
}
},
"bones": {
...
The only way to make sure they are imported is to import data as "New project/create a new skeleton" and delete the previous skeleton.