The S031 analyzer reports cases of schemas which enables only Computed and configures MaxItems, which is not valid.

&schema.Schema{
    Computed: true,
    MaxItems: 1,
}

&schema.Schema{
    Computed: true,
}

Singular reports can be ignored by adding the a //lintignore:S031 Go code comment at the end of the offending line or on the line immediately proceding, e.g.

//lintignore:S031
&schema.Schema{
    Computed: true,
    MaxItems: 1,
}