diff --git a/cached-configs/pycoalprocessing.lua b/cached-configs/pycoalprocessing.lua
index 79bd8cb1a..8b2e041fe 100644
--- a/cached-configs/pycoalprocessing.lua
+++ b/cached-configs/pycoalprocessing.lua
@@ -55,8 +55,8 @@ fix_tech("follower-robot-count-4", {order = "000015", prerequisites = {"follower
 fix_tech("follower-robot-count-5", {order = "000021", prerequisites = {"follower-robot-count-4", "utility-science-pack"}, unit = {count = 550, ingredients = {{"automation-science-pack", 10}, {"logistic-science-pack", 6}, {"chemical-science-pack", 3}, {"military-science-pack", 3}, {"utility-science-pack", 1}, {"production-science-pack", 2}}, time = 600}})
 fix_tech("follower-robot-count-6", {order = "000022", prerequisites = {"follower-robot-count-5"}, unit = {count = 900, ingredients = {{"automation-science-pack", 10}, {"logistic-science-pack", 6}, {"chemical-science-pack", 3}, {"military-science-pack", 3}, {"utility-science-pack", 1}, {"production-science-pack", 2}}, time = 600}})
 fix_tech("follower-robot-count-7", {order = "000024", prerequisites = {"follower-robot-count-6", "space-science-pack"}, unit = {ingredients = {{"automation-science-pack", 20}, {"logistic-science-pack", 10}, {"chemical-science-pack", 6}, {"military-science-pack", 6}, {"production-science-pack", 3}, {"utility-science-pack", 2}, {"space-science-pack", 1}}, time = 1200}})
-fix_tech("stack-inserter", {order = "000013", prerequisites = {"logistics-2"}, unit = {count = 1000, ingredients = {{"automation-science-pack", 2}, {"logistic-science-pack", 1}}, time = 60}})
-fix_tech("inserter-capacity-bonus-1", {order = "000014", prerequisites = {"stack-inserter"}, unit = {count = 1750, ingredients = {{"automation-science-pack", 2}, {"logistic-science-pack", 1}}, time = 60}})
+fix_tech("bulk-inserter", {order = "000013", prerequisites = {"logistics-2"}, unit = {count = 1000, ingredients = {{"automation-science-pack", 2}, {"logistic-science-pack", 1}}, time = 60}})
+fix_tech("inserter-capacity-bonus-1", {order = "000014", prerequisites = {"bulk-inserter"}, unit = {count = 1750, ingredients = {{"automation-science-pack", 2}, {"logistic-science-pack", 1}}, time = 60}})
 fix_tech("inserter-capacity-bonus-2", {order = "000015", prerequisites = {"inserter-capacity-bonus-1"}, unit = {count = 2750, ingredients = {{"automation-science-pack", 2}, {"logistic-science-pack", 1}}, time = 60}})
 fix_tech("inserter-capacity-bonus-3", {order = "000016", prerequisites = {"inserter-capacity-bonus-2", "chemical-science-pack"}, unit = {count = 1000, ingredients = {{"automation-science-pack", 3}, {"logistic-science-pack", 2}, {"chemical-science-pack", 1}}, time = 120}})
 fix_tech("inserter-capacity-bonus-4", {order = "000019", prerequisites = {"inserter-capacity-bonus-3", "production-science-pack"}, unit = {count = 900, ingredients = {{"automation-science-pack", 6}, {"logistic-science-pack", 3}, {"chemical-science-pack", 2}, {"production-science-pack", 1}}, time = 300}})
@@ -100,7 +100,7 @@ fix_tech("military-3", {order = "000014", prerequisites = {"military-science-pac
 fix_tech("military-4", {order = "000021", prerequisites = {"military-3", "utility-science-pack", "explosives"}, unit = {count = 2500, ingredients = {{"automation-science-pack", 6}, {"logistic-science-pack", 3}, {"chemical-science-pack", 2}, {"military-science-pack", 2}, {"production-science-pack", 1}}, time = 300}})
 fix_tech("uranium-ammo", {order = "000018", prerequisites = {"uranium-processing", "tank"}, unit = {count = 2750, ingredients = {{"automation-science-pack", 3}, {"logistic-science-pack", 2}, {"military-science-pack", 1}, {"chemical-science-pack", 1}}, time = 90}})
 fix_tech("atomic-bomb", {order = "000022", prerequisites = {"military-4", "rocket-control-unit", "rocketry"}, unit = {count = 900, ingredients = {{"automation-science-pack", 10}, {"logistic-science-pack", 6}, {"chemical-science-pack", 3}, {"military-science-pack", 3}, {"production-science-pack", 2}, {"utility-science-pack", 1}}, time = 600}})
-fix_tech("automation-3", {order = "000019", prerequisites = {"production-science-pack", "stack-inserter"}, unit = {count = 900, ingredients = {{"automation-science-pack", 6}, {"logistic-science-pack", 3}, {"chemical-science-pack", 2}, {"production-science-pack", 1}}, time = 300}})
+fix_tech("automation-3", {order = "000019", prerequisites = {"production-science-pack", "bulk-inserter"}, unit = {count = 900, ingredients = {{"automation-science-pack", 6}, {"logistic-science-pack", 3}, {"chemical-science-pack", 2}, {"production-science-pack", 1}}, time = 300}})
 fix_tech("explosives", {order = "000016", prerequisites = {"sulfur-processing", "mukmoux"}, unit = {count = 1000, ingredients = {{"automation-science-pack", 3}, {"logistic-science-pack", 2}, {"chemical-science-pack", 1}}, time = 120}})
 fix_tech("cliff-explosives", {order = "000017", prerequisites = {"explosives", "military-2"}, unit = {count = 1600, ingredients = {{"automation-science-pack", 3}, {"logistic-science-pack", 2}, {"chemical-science-pack", 1}}, time = 120}})
 fix_tech("land-mine", {order = "000017", prerequisites = {"explosives", "military-science-pack"}, unit = {count = 1600, ingredients = {{"automation-science-pack", 3}, {"logistic-science-pack", 2}, {"military-science-pack", 1}, {"chemical-science-pack", 1}}, time = 90}})
diff --git a/changelog.txt b/changelog.txt
index 2e163ce9b..a429f7b42 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -6,6 +6,7 @@ Date: ?
     - Changed internal name of "dirty-water-heavy" to "muddy-water".
     - Fixed generator equipment manager only filling the first slot. Resolves https://github.com/pyanodon/pybugreports/issues/1085
     - Fixed Diet beacon crash on changing frequency. Resolves https://github.com/pyanodon/pybugreports/issues/1114
+    - Fixed Bulk Inserter 1 and 2 technologies not having the correct prerequesites and dependants. Resolves https://github.com/pyanodon/pybugreports/issues/1086 and https://github.com/pyanodon/pybugreports/issues/1099
 ---------------------------------------------------------------------------------------------------
 Version: 3.0.39
 Date: 2025-07-20