What does it mean if he changed his tinder profile pic?

I've been dating this guy for a month or so, we've been on six dates. We have tentative plans this weekend and he invited me to a concert next week, for which he offered to buy the tickets in advance. We've never talked about being exclusive, (although we've been spending so much time together, I didn't think he was seeing anyone else). And I was pretty surprised when I saw he added a picture to his tinder profile. What does this mean?
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+1 y
We had a conversation and we're exclusive now. He changed his profile picture because he thought I was still using tinder too. But now we both deleted it :)
What does it mean if he changed his tinder profile pic?
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