        _followTokenIdByFollowerProfileId[followerProfileId] = followTokenId;

        uint48 mintTimestamp = uint48(StorageLib.getTokenData(followTokenId).mintTimestamp);

        _followDataByFollowTokenId[followTokenId].followerProfileId = uint160(followerProfileId);
        _followDataByFollowTokenId[followTokenId].originalFollowTimestamp = mintTimestamp;
        _followDataByFollowTokenId[followTokenId].followTimestamp = mintTimestamp;
    function follow(
        uint256 followerProfileId,
        address transactionExecutor,
        uint256 followTokenId
    ) external override onlyHub returns (uint256) {
        if (_followTokenIdByFollowerProfileId[followerProfileId] != 0) {
            revert AlreadyFollowing();
        }
        unchecked {
            ++_followerCount;
        }

        _followTokenIdByFollowerProfileId[followerProfileId] = followTokenId;
forge test --match-test testCanMigrateWhileFollowing -vvv
    function tryMigrate(
        uint256 followerProfileId,
        address followerProfileOwner,
        uint256 idOfProfileFollowed,
        uint256 followTokenId
    ) external onlyHub returns (uint48) {
+       if (_followTokenIdByFollowerProfileId[followerProfileId] != 0) {
+           return 0;
+       }
+
        // Migrated FollowNFTs should have `originalFollowTimestamp` set
        if (_followDataByFollowTokenId[followTokenId].originalFollowTimestamp != 0) {
            return 0; // Already migrated
        }
