Subjects/Pedagogicheskaya-deyatelnost-po-realizacii-adaptirovannyx-obrazovatelnyx-programm-doshkolnogo-obrazovaniya-i-organizacii-razvivayushhej-deyatelnosti-dlya-detej-s-ogranichennymi-vozmozhnostyami-zdorovya-iili-invalidnostyu-v-gruppax-raznoj-napravlennosti

Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection's state is no longer correct.