java.lang.IllegalStateException: Unequal indices: current index=2, other index=1
	at <JS>.$rt_exception (classes.js:10)
	at <JS>.$rt_throw (classes.js:10)
	at BaseListItemOperation.assertIndicesEqual(BaseListItemOperation.java:42)
	at ChildOperation.assertFullEqualityWithoutNodeIdsCheck(ChildOperation.java:75)
	at AddChildOperation.doTransform(AddChildOperation.java:35)
	at AddChildOperation.doTransform(Unknown Source)
	at BaseOperation.transform(BaseOperation.java:9)
	at CompositeOperation.doTransformThrough(CompositeOperation.java:115)
	at CompositeOperation.doTransformThrough(Unknown Source)
	at BaseOperation.doTransform(BaseOperation.java:14)