OptionalCleanremap = rewrite via key map when the target is in the clone set, else per OnMissing; reuse = leave; regenerate = new UUID; null = set null; drop = remove element/key.
OptionalOnFor remap when the referenced record was not cloned: reuse the original (default) or drop the element and count it.
Path selector: dot segments and [] for arrays, e.g. 'layout.content[].componentState.config.viewId'.
OptionalTargetEntity the ID refers to, for remap.
Remove arrays and objects left empty by a drop. Default true.