diff --git a/spacy/errors.py b/spacy/errors.py
index 16188ca8a..391770ef2 100644
--- a/spacy/errors.py
+++ b/spacy/errors.py
@@ -955,7 +955,7 @@ class Errors(metaclass=ErrorsWithCodes):
     E1046 = ("{cls_name} is an abstract class and cannot be instantiated. If you are looking for spaCy's default "
              "knowledge base, use `InMemoryLookupKB`.")
     E1047 = ("Invalid rich group config '{label}'.")
-    E1048 = ("Length > 63 in rich group config '{label}.")
+    E1048 = ("Length > 31 in rich group config '{label}.")
     E1049 = ("Error splitting UTF-8 byte string into separate characters.")
 
 
diff --git a/spacy/ml/models/tok2vec.py b/spacy/ml/models/tok2vec.py
index 3906f6b42..7325c2683 100644
--- a/spacy/ml/models/tok2vec.py
+++ b/spacy/ml/models/tok2vec.py
@@ -208,7 +208,7 @@ def _verify_rich_config_group(
             raise ValueError(Errors.E1047.format(label=label))
     elif search_chars is not None:
         raise ValueError(Errors.E1047.format(label=label))
-    if lengths is not None and max(lengths) > 63:
+    if lengths is not None and max(lengths) > 31:
         raise ValueError(Errors.E1048.format(label=label))