In the PR #1140 this field was added in commitad697cd2c1, but in this same PR in commit28d12fe55all the related functionality that had been added was removed but the field was not removed.
In the PR #1140 this field was added in commitad697cd2c1, but in this same PR in commit28d12fe55all the related functionality that had been added was removed but the field was not removed.