Conversion of ARM Compiler 5 uVision project to ARM compiler 6

I have a project that is written with ARM compiler 5 and does not compile with current tool chain. In order to continue working on this project in the future I need to make changes to project and code to compile with new tool chain. Compiler 6 does not support some things like asm compiling directives that are in the old project. Is there a good approach to begin conversion? Any suggestions are welcome.

Some raw information:

IDE-Version:

ֲµVision V5.31.0.0
Copyright (C) 2020 ARM Ltd and ARM Germany GmbH. All rights reserved.

Tool Version Numbers:
Toolchain:        MDK-ARM Cortex-M0/M0+ for ST  Version: 5.31.0.0
Toolchain Path:    C:\Keil_v5\ARM\ARMCC\Bin
C Compiler:         Armcc.exe        V5.06 update 6 (build 750)
Assembler:          Armasm.exe        V5.06 update 6 (build 750)
Linker/Locator:     ArmLink.exe        V5.06 update 6 (build 750)
Library Manager:    ArmAr.exe        V5.06 update 6 (build 750)
Hex Converter:      FromElf.exe        V5.06 update 6 (build 750)
CPU DLL:               SARMCM3.DLL          V5.31.0.0
Dialog DLL:         TARMCM1.DLL          V1.14.2.0
Target DLL:             STLink\ST-LINKIII-KEIL_SWO.dll      V3.0.7.0
Dialog DLL:         TARMCM1.DLL          V1.14.2.0