diff --git a/src/caosadvancedtools/table_json_conversion/convert.py b/src/caosadvancedtools/table_json_conversion/convert.py
index 370dc85d953f44c302e2d3e04bbb0384a2b8b222..87427cf842d9213a4e3c335ebfb3a0b862f52439 100644
--- a/src/caosadvancedtools/table_json_conversion/convert.py
+++ b/src/caosadvancedtools/table_json_conversion/convert.py
@@ -407,7 +407,6 @@ class XLSXConverter:
           If True, do not fail with unresolvable foreign definitions, but collect all errors.
         """
         row_type_column = xlsx_utils.get_row_type_column_index(sheet)
-        col_type_row = xlsx_utils.get_column_type_row_index(sheet)
         foreign_columns = xlsx_utils.get_foreign_key_columns(sheet)
         foreign_column_paths = {col.index: col.path for col in foreign_columns.values()}
         data_columns = xlsx_utils.get_data_columns(sheet)
@@ -430,7 +429,6 @@ class XLSXConverter:
         # entries: dict[str, list[SimpleNamespace]] = {}
 
         exceptions = []
-        warns = []
         col_names = {}
         for row_idx, row in enumerate(sheet.iter_rows(values_only=True)):
             # Skip non-data rows