Tummy tuck question - belly button detached.

I had my tummy tuck on 11/28/16, everything went well however, the surgeon said my belly button prior to surgery was completely detached from the "cord" so essentially nothing was anchoring my belly button. When he asked my family about it while I was in recovery, he for sure thought I had to of had a hernia repair because of the belly button, but I haven't. Is this common?

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