No mutations at all

updateStepFourProps(type, operation, data) {
        let localData = [];
        if (operation === 'add') {
            if (type === 'educationalBackground') {
                // Create Local Copy
                localData = this.state.educationalBackground;
                // Push Data In Local Copy
                localData.push(data);
            } else if (type === 'academicCertificates') {
                // Create Local Copy
                localData = this.state.academicCertificates;
                // Push Data In Local Copy
                localData.push(data);
            }
        } else if (operation === 'remove') {
            if (type === 'educationalBackground') {
                // Create Local Copy
                localData = this.state.educationalBackground.filter((item) => {
                    return item.id !== data;
                });
            } else if (type === 'academicCertificates') {
                // Create Local Copy
                localData = this.state.academicCertificates.filter((item) => {
                    return item.id !== data;
                });
            }
        }
        // Set New State
        this.setState({
            [type]: localData,
        }, () => {
            // Clear localData after you're done with it
            localData = [];
        });
    }