Merge pull request kohya-ss#1312 from rockerBOO/patch-2

Fix caption_separator missing in subset schema

Author: kohya-ss

Diff for: library/config_util.py

@@ -191,6 +191,7 @@ def __validate_and_convert_scalar_or_twodim(klass, value: Union[float, Sequence]
         "keep_tokens": int,
         "keep_tokens_separator": str,
         "secondary_separator": str,
+        "caption_separator": str,
         "enable_wildcard": bool,
         "token_warmup_min": int,
         "token_warmup_step": Any(float, int),