Recently replaced battery already being told to "Service Battery"

Hi lovely people,

I recently performed a home battery replacement (carefully and seemingly successfully) on the above Macbook, yet I'm already getting the "Service Battery" alert when I click on the battery icon.

Battery Information:

Model Information:

•  Serial Number: D861015004NDGDL3T
•  Manufacturer: ifixit
•  Device Name: bq20z451
•  Pack Lot Code: 0
•  PCB Lot Code: 0
•  Firmware Version: 2
•  Hardware Revision: 00aa
•  Cell Revision: 2
•  Charge Information:
•  Charge Remaining (mAh): 5290
•  Fully Charged: No
•  Charging: No
•  Full Charge Capacity (mAh): 5295

 Health Information:

•  Cycle Count: 88
•  Condition: Service Battery
•  Battery Installed: Yes
•  Amperage (mA): -870
•  Voltage (mV): 11746

Thank you so much,

Roan