Error: Must supply a value for form control at index: 0.
    at forms.js:5026
    at forms.js:4971
    at Array.forEach (<anonymous>)
    at FormArray._forEachChild (forms.js:4966)
    at FormArray._checkAllValuesPresent (forms.js:5019)
    at FormArray.setValue (forms.js:4745)
    at AttendenceFormComponent.<anonymous> (attendence-form.component.ts:43)
    at Generator.next (<anonymous>)
    at tslib.es6.js:73
    at new ZoneAwarePromise (zone-evergreen.js:876)
    at resolvePromise (zone-evergreen.js:797)
    at new ZoneAwarePromise (zone-evergreen.js:879)
    at Module.__awaiter (tslib.es6.js:69)
    at AttendenceFormComponent.setClass (attendence-form.component.ts:42)
    at Object.eval [as handleEvent] (AttendenceFormComponent.html:6)
    at handleEvent (core.js:36772)
    at callWithDebugContext (core.js:38390)
    at Object.debugHandleEvent [as handleEvent] (core.js:38026)
    at dispatchEvent (core.js:24335)
    at core.js:26203```

this error comes when I reselect date

ERROR Error: Must supply a value for form control at index: 0.
    at forms.js:5026
    at forms.js:4971
    at Array.forEach (<anonymous>)
    at FormArray._forEachChild (forms.js:4966)
    at FormArray._checkAllValuesPresent (forms.js:5019)
    at FormArray.setValue (forms.js:4745)
    at AttendenceFormComponent.setDate (attendence-form.component.ts:54)
    at Object.eval [as handleEvent] (AttendenceFormComponent.html:18)
    at handleEvent (core.js:36772)
    at callWithDebugContext (core.js:38390)