Fix InvalidOperationError

✅ Solution

InvalidOperationError in Polars often stems from type mismatches during operations like filtering or selection, especially after changes in data representation (e.g., after scanning a Delta table or upgrading Polars). To fix, explicitly cast columns to the expected data type (e.g., pl.Boolean, pl.List) before performing the operation. Using `series.dtype` to inspect the actual datatype and correctly represent `null` values could prevent such errors.