Can't invade planet. [Pre-sentient/colonized bug]

[teos☭]

Hi, I'm experiencing a little bug. Not game breaking but it's a strange one.
An other empire colonized a planet near my borders (nothing strange yet) and as soon as I got the chance I decided to attack him to take the planet. Turns out the planet is a tomb world and he didn't colonize it with his species but the planet already had a pre-sentient specie (so it is not "colonized" for the game).
The main problem here is that I can't invade it since it isn't "colonizated".
Now I'm stuck with this war because the objective (getting the planet) can't be succeded, and he keeps holding the planet.
Anybody got this kind of bug?
(I've done some screenshots, check them in my profile)

[Knight.R]

Originally posted by teos:

Hi, I'm experiencing a little bug. Not game breaking but it's a strange one.
An other empire colonized a planet near my borders (nothing strange yet) and as soon as I got the chance I decided to attack him to take the planet. Turns out the planet is a tomb world and he didn't colonize it with his species but the planet already had a pre-sentient specie (so it is not "colonized" for the game).
The main problem here is that I can't invade it since it isn't "colonizated".
Now I'm stuck with this war because the objective (getting the planet) can't be succeded, and he keeps holding the planet.
Anybody got this kind of bug?
(I've done some screenshots, check them in my profile)

p.s. not mad at all, bugs happen.

Im not sure that its so much a bug but rather a how to say...
"Unforseen player choice" not taken accout by the developers.
Because i recall doing the same thing in one of my early games in which i found a tomb world in the sol system and gained a pre-sentient species of radiated roaches in my empire.
I colonized the tomb world with a robot pop and started to spread the pre-sentient pops around every tomb world i could find for the lols. However the returns in science and energy worked by them was garbage so i didnt do it again.

However i could be wrong and probably reading your description wrong.

[teos☭]

Well going forward in my campaign I discovered that this empire did it with a couple of systems. I can't see any robots around his empire now but the strange thing is that I can't even see the icon of the fortification when I bombard the planet (i mean the green bar that slowly goes empty, near the planet name). So with this said I don't really get how he did it. I don't really think that he did the way you did.

Originally posted by Knight.R:

Im not sure that its so much a bug but rather a how to say...
"Unforseen player choice" not taken accout by the developers.
Because i recall doing the same thing in one of my early games in which i found a tomb world in the sol system and gained a pre-sentient species of radiated roaches in my empire.
I colonized the tomb world with a robot pop and started to spread the pre-sentient pops around every tomb world i could find for the lols. However the returns in science and energy worked by them was garbage so i didnt do it again.

However i could be wrong and probably reading your description wrong.

[Knight.R]

Originally posted by teos:

Well going forward in my campaign I discovered that this empire did it with a couple of systems. I can't see any robots around his empire now but the strange thing is that I can't even see the icon of the fortification when I bombard the planet (i mean the green bar that slowly goes empty, near the planet name). So with this said I don't really get how he did it. I don't really think that he did the way you did.

Originally posted by Knight.R:

Im not sure that its so much a bug but rather a how to say...
"Unforseen player choice" not taken accout by the developers.
Because i recall doing the same thing in one of my early games in which i found a tomb world in the sol system and gained a pre-sentient species of radiated roaches in my empire.
I colonized the tomb world with a robot pop and started to spread the pre-sentient pops around every tomb world i could find for the lols. However the returns in science and energy worked by them was garbage so i didnt do it again.

However i could be wrong and probably reading your description wrong.

Actually i believe the AI did something i just discovered how to do in a recent game.
The AI either Uplifted a Pre-sentient Species (Those planets with pops that have the (earthbound ,starbound, on them) Along with No actual traits.
Or if they have the slave ethos then they just invaded a pre-space civ and started spreading them around via colony ships.