That looks like MD machine doubling to me and small date doesn't exist for this date because date varieties don't exist for 2006 zilincons.
There's no Large Date/Small Date variety for 2006. As @Pickin and Grinin said, it's damaged. Not a 2 next to the D mint mark.
The 2 next to the D mint mark is a spot of damage. You can see the metal is peeled back. Being zinc it will start to rot soon. There are no die varieties for this date and it has some MD as well.
You want specifics? Okay! A Mint employee was carrying the 4,000 pound ballistic bag when he had to sneeze. He didn't want to drop the bag and cause the pennies to scatter all over the floor, so he let go of a big sneeze and his snot fell on this coin.
Its a worn, damaged zincoln. If you ever have a question about doubled dies or RPM's, go to varietyvista and go to the section on shield cents and then chose DDO or DDR if you think it's a double die. Or choose RPM's for repunched mintmarks. Then choose the date and mintmark on the coin you have and look at all the varieties there are on that year. http://www.varietyvista.com/ And to answer your question, was the damage mint damage or PMD? There is no such thing as mint damage. It's called an error if it was made at the mint. If anyone anyone says a coin is damaged, they mean it wasn't made at the mint and you should probably spend it. And if a coin was actually damaged at the mint, it wouldn't be worth anything anyways.
As already answered. It is damage. An error happens at the mint. Damage and alterations happen after the minting process and are worthless.
Your questions....... "Can you pls be more specific? What kind of damage PMD or Mint time damage?!!!!?" .......are just as ridiculous as my response. There is no way anyone can tell you exactly what, or how, it happened. Start using a little common sense!
A true "doubled die" doesn't happen after 1999 because all dies after that used single-press hubbing. There are cases where the die or hub skips a tiny bit during the single press but the result is very minor and usually occurs near the center of the coin, like Lincoln's ear. https://doubleddie.com/58201.html
I think you are reaching too far to find an error on a badly damaged (PMD) cent, and a lousy Zincoln at that. You have a post mint damaged zinc cent and wishing otherwise isn't going to make it so. Just giving you my honest opinion for free.