Unable to boot into Ubuntu after cloning NVME drive with Macrium Reflect

[vw16v]

Yes, that's it. (Disk 0 = Source and Disk 1 = Target)
Gparted will take care of the UUIDs, you do not have to look for them.
Just make sure that your ESP contains the original Ubuntu folder ( I would doubt that Macrium Reflect has damaged/changed it)
You must not reboot with both nvme disks attached because "UUID Clash"

Hi tea for one, I just booted into a Linux Mint distro and ran gparted. Here's what I show for the installed/original /dev/nvme0n1 on the 162GB partition.
https://imgur.com/2VFEc3R

If I right click on choose copy on nvme0n1p4 and then select the drop down and choose my target/cloned NVME I get this option.
https://imgur.com/MtMzKuX

However, I can't delete the current /dev/sd4 that has Linux installed on the Target NVME/Clone drive. I can only resize or move it when right clicking.
Should I paste the source NVME partition directly to the target/Clone NVME? I'm not sure what to do. Thanks again for any help. I'll be sure to give you beans if possible?

[tea for one]

Almost there.
You don't paste nvme0n1p4 into unallocated space.
You paste into sda4 (no need to delete anything, it will replace sda4)

[vw16v]

Almost there.
You don't paste nvme0n1p4 into unallocated space.
You paste into sda4 (no need to delete anything, it will replace sda4)

, hmm, ok. The only problem is when I copy nvme0n1p4 I can't paste it into /dev/sda4 Target/Clone NVME without selecting the unallocated space. If I right click on nvme0n1p4 and choose copy and then select /dev/sda4 target it does not allow me to paste (It's greyed out). The only way I can appear to paste it is by selecting the unallocated space. Thanks for sticking with me on this.

EDIT: I just noticed if I unmount /dev/sd4 I can then paste the nvme0n1p4 to my cloned/NVME. Should I proceed?
https://imgur.com/gaeIMah

[tea for one]

The source and target partitions must be unmounted.
In your live session, open a terminal and enter

sudo umount -a

Edit: I saw your edit after I posted this reply - Please proceed

[vw16v]

The source and target partitions must be unmounted.
In your live session, open a terminal and enter

sudo umount -a

Hmm, per my previous screenshot it looks like I could of pasted the source nvme0n1p4 to my target /dev/sda4 where Linux resides without issues.

If I run the command you mentioned I get this.

mint@mint:~$ sudo umount -a
umount: /run/user/999: target is busy.
umount: /tmp: target is busy.
umount: /sys/fs/cgroup: target is busy.
umount: /: target is busy.
umount: /cdrom: target is busy.
umount: /run: target is busy.
umount: /dev: target is busy.

[vw16v]

The source and target partitions must be unmounted.
In your live session, open a terminal and enter

sudo umount -a

Edit: I saw your edit after I posted this reply - Please proceed

Ah, ok. I just noticed your edit. I went ahead and pasted it per your suggestion. I now have the nvme0n1p4 pasted/overwritten to the /dev/sda4.
Do you think If I shut down and then install my Cloned NVME I will be good with GRUB/Dual boot?

[tea for one]

Did you double check that the Ubuntu boot folder is present in your cloned ESP?

[vw16v]

Did you double check that the Ubuntu boot folder is present in your cloned ESP?

Yeah, it shows /dev/sda1 in gparted as EFI System Partition with flags boot,esp.
That's the same thing it shows for my original NVME on /dev/nvme0n1
So, I should be good hopefully?

[vw16v]

Hi tea for one, I installed my NVME Cloned drive after following your suggestions. Unfortunately it's still booting directly to windows. I went ahead and booted off the boot-repair again via USB. Should I attach it to the thread you posted previously or email that you posted on the previous page?

Here's the boot-repair suggestions PRIOR to running the recommended repair.

https://paste.ubuntu.com/p/3xp5qdNjzs/

I went ahead and ran the suggested boot repair again. It says it reinstalled GRUB and a few other things. I'm going to see if the 2nd time was a charm? Thanks again for the help.

[vw16v]

FYI, I went ahead and booted to the boot-repair USB drive again and gathered the blkid output as recommended. This is with my cloned/NVME drive installed and my original NVME drive disconnected. Thanks for any other ideas. This is the first time that boot-repair has not worked for me.

int@mint:~$ blkid
/dev/nvme0n1p5: BLOCK_SIZE="512" UUID="169818ED9818CCDD" TYPE="ntfs" PARTUUID="64a798c3-252c-49e6-ba79-95e5f4c6a5b1"
/dev/nvme0n1p3: LABEL="Windows-SSD" BLOCK_SIZE="512" UUID="48A2E88AA2E87E36" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="e8a7d0b2-0a73-4046-82ca-9d815da05e95"
/dev/nvme0n1p1: LABEL_FATBOOT="SYSTEM_DRV" LABEL="SYSTEM_DRV" UUID="D0E8-205E" BLOCK_SIZE="512" TYPE="vfat" PARTLABEL="EFI system partition" PARTUUID="303a4c17-90b2-4258-a536-590849804b1d"
/dev/nvme0n1p4: UUID="f3409908-cd51-4af4-9735-c5373816ba49" BLOCK_SIZE="4096" TYPE="ext4" PARTUUID="99af6c75-dddd-4346-9578-f3df55fe8ebd"
/dev/loop0: TYPE="squashfs"
/dev/dm-0: BLOCK_SIZE="2048" UUID="2023-12-23-05-05-55-00" LABEL="Boot-Repair-Disk 64bit" TYPE="iso9660" PTUUID="14eb2669" PTTYPE="dos"
/dev/sda1: LABEL="YUMI" UUID="4E21-0000" BLOCK_SIZE="512" TYPE="exfat" PTTYPE="dos" PARTUUID="ed8fda96-01"

Appreciate any other ideas!