Generic lookup table for multiple tables

I'm sure this issue has come up and been solved before. If this is not the right place for this post, please let me know the correct forum.
Here is an issue I have. I have multiple tables of different inventory items. Each inventory item can have multiple notes/actions associated or a note or action can be assigned to multiple devices. So I have a many-to-many relationship and need a lookup table. I would like to create just one lookup table not a lookup table for each combination.
My first thought was to create a main table to hold all primary keys and table names and connecting the lookup table to that.
1. Create main GUID table to hold all primary keys and table names
2. All primary keys will be created by sys.guid to ensure all keys are unique.
3. The Lookup table primary key will be a composite key
4. If a Note is deleted – it deletes from the main GUID table and the delete cascades down to all other tables.
CREATE TABLE "ND_NOTE"
(     "GUID" NUMBER,
     "NOTE_DESCRIPTION" VARCHAR2(4000),
     CONSTRAINT "ND_NOTE_PK" PRIMARY KEY ("GUID") ENABLE
ALTER TABLE "ND_NOTE" ADD CONSTRAINT "ND_NOTE_FK" FOREIGN KEY ("GUID")
     REFERENCES "ND_GUID" ("GUID") ENABLE
CREATE TABLE "ND_VIRTUAL_COMP"
(     "GUID" NUMBER,
     "VIRTUAL_COMP_NAME" VARCHAR2(4000),
     CONSTRAINT "ND_VIRTUAL_COMP_PK" PRIMARY KEY ("GUID") ENABLE
ALTER TABLE "ND_VIRTUAL_COMP" ADD CONSTRAINT "ND_VIRTUAL_COMP_FK" FOREIGN KEY ("GUID")
     REFERENCES "ND_GUID" ("GUID") ON DELETE CASCADE ENABLE
CREATE TABLE "ND_GUID"
(     "GUID" NUMBER,
     "TABLE_NAME" VARCHAR2(4000),
     "STATUS" NUMBER,
     CONSTRAINT "ND_GUID_PK" PRIMARY KEY ("GUID") ENABLE
CREATE TABLE "ND_NOTE_LK"
(     "GUID" NUMBER,
     "ANY_OTHER_GUID" NUMBER,
     CONSTRAINT "ND_NOTE_LK_CON" PRIMARY KEY ("GUID", "ANY_OTHER_GUID") ENABLE
ALTER TABLE "ND_NOTE_LK" ADD CONSTRAINT "ND_NOTE_LK_FK" FOREIGN KEY ("GUID")
     REFERENCES "ND_GUID" ("GUID") ON DELETE CASCADE ENABLE
ALTER TABLE "ND_NOTE_LK" ADD CONSTRAINT "ND_NOTE_LK_FK2" FOREIGN KEY ("ANY_OTHER_GUID")
     REFERENCES "ND_GUID" ("GUID") ON DELETE CASCADE ENABLE
Is there a better way to do this? I feel like I'm talking myself into circles.

hi ,
Can u explain the 'LOGIC' mistake which u have figured out .. will be useful for freshers and beginners
With Warm Regards
ssr

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