Paid into 2 x S&S ISA in one tax year

I have an old S&S ISA that was opened in a previous tax year (Account A). This tax year, I opened a new S&S ISA (Account B) and started investing monthly (under the £20k limit). I have just realised that my automatic deposit to Account A didn’t stop for 2 x months of this financial year and therefore a total of £400 has been added to the account. What should I do as I don’t want to close down either Accounts but fear I may get in trouble as have deposit money into 2 x S&S ISA accounts this tax year, Thank you.

Hi,
 

As you can only pay into one S&S account each tax year, you must close down one of the accounts . Thank you