Gostev wrote:OK, then it makes sense. Unfortunately, in this case indeed recreating the jobs is the only option. There is no way to "fix" this issue once it gets introduced in the backup chain.
I don't think your plan will work, the job will probably fail reporting it cannot find older backup files. You are better of starting clean, and it will require the same disk space as your plan above anyway.
On top of that, please wait till your engineer investigates job debug logs and finds out the reason for this issue.