Excess ROTH IRA Contribution

I made an excess ROTH IRA contribution in July of 2019 from a Fidelity Rollover IRA to a Fidelity ROTH IRA (Conversion). I exceeded the income limits for MAGI. Can I rollover the excess ROTH IRA back into the original Rollover IRA or do I need to open a new IRA account? In addition, I was wondering if the original transaction triggers a 10% early withdrawal penalty? Since it was I rollover and I never withdrew the money I am hoping not as I am not 59 1/2.  It looks like I report the transaction in Quicken as prompted and then amend my 2019 return next year as required with the new 1099-R.   Thanks for the help.