diff --git a/.github/workflows/README.md b/.github/workflows/README.md
index 5815f0e..3312d27 100644
--- a/.github/workflows/README.md
+++ b/.github/workflows/README.md
@@ -36,7 +36,6 @@ writes:
 
 - [`scorecard.yml`](scorecard.yml)
 - [`dependabot-update-openapi-snapshots.yml`](dependabot-update-openapi-snapshots.yml)
-  (mints app token before regenerating and committing snapshots)
 
 This keeps write operations explicit and reduces default token blast radius.
 
diff --git a/jsonpatchx/backend.py b/jsonpatchx/backend.py
index 65d498b..aa3316f 100644
--- a/jsonpatchx/backend.py
+++ b/jsonpatchx/backend.py
@@ -90,8 +90,7 @@ def parts(self) -> Sequence[str]:
 
 
 class _DEFAULT_POINTER_CLS(JsonPointer):  # type: ignore[misc]
-    # fixes https://github.com/stefankoegl/python-json-pointer/issues/63
-    # and https://github.com/stefankoegl/python-json-pointer/issues/70
+    # fixes https://github.com/stefankoegl/python-json-pointer/issues/70
     @override
     @classmethod
     def get_part(cls, doc, part):  # type: ignore[no-untyped-def]
@@ -100,21 +99,8 @@ def get_part(cls, doc, part):  # type: ignore[no-untyped-def]
                 f"Cannot apply token {part!r} to non-container type {type(doc)}"
             )
         key = super().get_part(doc, part)
-        if isinstance(key, int) and not _NONNEGATIVE_ARRAY_INDEX_PATTERN.fullmatch(
-            str(part)
-        ):
-            raise JPException("'%s' is not a valid sequence index" % part)
         return key
 
-    @override
-    def to_last(self, doc):  # type: ignore[no-untyped-def]  # pragma: no cover
-        doc, key = super().to_last(doc)
-        if isinstance(key, int) and not _NONNEGATIVE_ARRAY_INDEX_PATTERN.fullmatch(
-            str(self.parts[-1])
-        ):
-            raise JPException("'%s' is not a valid sequence index" % self.parts[-1])
-        return doc, key
-
     @override
     def walk(self, doc, part):  # type: ignore[no-untyped-def]
         part = self.get_part(doc, part)  # type: ignore[no-untyped-call]