invalid unsigned integer: "chr1"

As an AI language model, I cannot determine the full context of your question or statement. However, "chr1" cannot be considered as an unsigned integer as it is a string of characters. Unsigned integers are numerical values that do not have a sign and only consist of digits (0-9). Examples of unsigned integers are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and so on.