Call to undefined method Illuminate\Database\Eloquent\Relations\BelongsTo::save()

Hi! Hoping for some guidance.

I can edit a form field and it will save no problem, but creating a new entry throws this error:

Call to undefined method Illuminate\Database\Eloquent\Relations\BelongsTo::save()

Call to undefined method Illuminate\Database\Eloquent\Relations\BelongsTo::save()

Call to undefined method Illuminate\Database\Eloquent\Relations\BelongsTo::save()

Call to undefined method Illuminate\Database\Eloquent\Relations\BelongsTo::save()

Entry:

Forms\Components\TextInput::make('member_id'),`

Forms\Components\TextInput::make('member_id'),`

Forms\Components\TextInput::make('member_id'),`

Forms\Components\TextInput::make('member_id'),`

Model:

public function member(): BelongsTo
    {
        return $this->belongsTo(Member::class);
    }

public function member(): BelongsTo
    {
        return $this->belongsTo(Member::class);
    }

public function member(): BelongsTo
    {
        return $this->belongsTo(Member::class);
    }

public function member(): BelongsTo
    {
        return $this->belongsTo(Member::class);
    }

Thank you.