downgrade
n. countable B2 Upper Intermediate US //ˈdaʊnˈɡɹeɪd// UK //dˈaʊŋɡɹeɪd// down·grade
n. a change to a lower or less powerful level. In computing, it means replacing a newer version of software with an older one.
n. a reduction in rank, status, or quality; in a technical context, the substitution of a software or hardware system with an earlier or less advanced version.
The software downgrade fixed the bugs in the new version.
After experiencing several system crashes, the IT department recommended a temporary downgrade to the previous stable release.
The credit agency's recent downgrade of the national debt has led to increased borrowing costs and a sharp decline in investor confidence across the region.
From down- + grade.
Usage
Often paired with the preposition 'to' when indicating the target version or level.