So, that's what happened.
I had two partitions, one was Machintosh HD with 250 GB of space and BOOTCAMP with 750 GB of space.
Then, later, my Machintosh HD had a problem of looping start.
So, to recover, I went into recovery, I deleted the BOOTCAMP partition and installed another OSX named under macos2, hoping to delete and merge macos2 with the original Machintosh HD.
However, after erasing and removing Machintosh HD with the disk utility, it became a container disk that it could not delete.
I have therefore deleted the container disc with the help of a terminal. So now, I can not see that 250 GB in the disk utility and the terminal, but still says that the computer has 1 TB in it.
How to find 250 GB and how to merge it with macos2, knowing that macos2 is my main boot disk.
This is my diskutil list
I use MacOSX Mojave 10.14.4 with iMac 2017 1 TB