# Connect subscriptions
## Symptoms
A subscription change for a customer in your billing system can cause spurious movements in your MRR (caused by a "overlap" or a "gap" in subscriptions).
For example: *You have a customer with a €100 subscription, then a new €150 subscription before cancelling the old one. In that case, you will have €250 of MRR for a short period instead of €150.*
To remedy this phenomenon, you can merge subscriptions on your Fincome account. This way, the last active subscription will become the one used in your calculations, and you will no longer have spurious MRR movements.
## Merge subscriptions on Fincome
Go to the customer page (via "Analytics" > "My customers" or by searching for a customer directly using the search function). In the subscription section, click "Show chart" then "Merge subscriptions." You can then select two subscriptions you want to merge directly on the chart. Once confirmed, you will see a "link" icon appear on the "child" subscription, indicating that this subscription has been attached to another subscription.
Once the subscriptions are connected, in case of overlap or gap, feel free to enable the [neutralization rule](/en/ajuster/invoice-splits-overlaps.md).
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