It will not disrupt the operation of aufs, but you will have inconsistant packages, your file system will have additional files and directories which should not exist, ie files and directories which should have been removed by package updates will re-appear in the "tar copied" file system. That's what I believe should be the behaviour of 'aufs'. Your views may differ.

Dell Poweredge R720 8SFF 2.5" x Xeon E5-2680 v2 2.8GHz 20-Cores 128gb 4x Trays
$349.99
Dell EMC PowerEdge R440 Xeon silver 4215 2.5GHz 16 GB ram 2x 550W PSU No HDD
$275.00
Microsoft Windows Server 2022 Standard 64-bit License & DVD 16 Core US Shipping
$34.99
Broadcom 9600-24i Tri-Mode RAID Controller 4.0 NVMe SAS SATA NEW 05-50111-01003
$639.69
Dell Poweredge R720 8SFF 2.5" 2x Xeon E5-2680 v2 2.8GHz 20-Cores 64gb 4x Trays
$259.99
Dell PowerEdge R620 2x Xeon E5-2630 v2 3.1GHz 2.5" 4-BAY 32GB RAM No OS 2x 495w
$174.95
Supermicro 1027GR-TSF 1U Rackmount Server 2x Xeon 2.3GHz 128GB DDR3
$219.99
Supermicro 2U GPU Server SYS-2029GP-TR 2x Xeon 6130 32C 6x PCIe 3.0 x16 Slots
$745.00
WINDOWS SERVER 2025 [REMOTE DESKTOP SERVICES] 50 USER RDS CAL SEALED
$119.18
WINDOWS SERVER 2022 [REMOTE DESKTOP SERVICES] 50 USER RDS CAL SEALED
$113.09