I've updated Orbital Cannon from 0.8.1 to the latest version and upon loading the save, after a second this error appears:

Error while running event orbital-cannon::powered_machine_enabled_orbital-cannon (ID 332)
'link_id': real number expected got nil.
stack traceback:
[C]: in function 'newindex'
__orbital-cannon/script/cannon-internal.lua:37: in function 'refresh_cannon'
orbital-cannon/script/cannon-internal.lua:138: in function 'enable_cannon'
orbital-cannon/script/orbital-cannon.lua:78: in function 'handler'
core/lualib/event_handler.lua:72: in function <core/lualib/event_handler.lua:70>
stack traceback:
[C]: in function 'raise_event'
powered-machine/control.lua:143: in function 'cost_check'
powered-machine/control.lua:174: in function <powered-machine/control.lua:172>

Looking at it.

This is one of those were I will have trouble reproducing it, but the line where the error is thrown, should be fixed.

After the update everything is working, but after a while this happens:
Error while running event orbital-cannon::powered_machine_enabled_orbital-cannon (ID 332)
'link_id': real number expected got nil.
stack traceback:
[C]: in function 'newindex'
__orbital-cannon/script/cannon-internal.lua:110: in function 'refresh_cannon'
orbital-cannon/script/cannon-internal.lua:138: in function 'enable_cannon'
orbital-cannon/script/orbital-cannon.lua:78: in function 'handler'
core/lualib/event_handler.lua:72: in function <core/lualib/event_handler.lua:70>
stack traceback:
[C]: in function 'raise_event'
powered-machine/control.lua:143: in function 'cost_check'
powered-machine/control.lua:174: in function <powered-machine/control.lua:172>

In the end, I resolved it by replacing the orbital cannons.
Everything seems to work correctly now!

So the migration for this did not work properly. Added another check for this anyway, and yes breaking and replacing it is a guaranteed fix.